This density of states is about 28 times larger than that of the ambient pressure sulfer hydride , \( g_0(\epsilon _F) = 0.038/eV{Å}^3\)  [1]}. Using the \(K = 0.021/GPa\) , the density of states of the H\(_3\) S system at pressure \(P = 155 GPa\) , we find, \(g_(\epsilon _F) = g_0(\epsilon _F)e^{KP} \equiv 0.911/eV{Å}^3\) . This excellent agreement justifies our massive electron concept for the superhydrides under pressure.
